How to choose the most effective command

I know a password is a 5-character password from the set A-Z,a-z,0-9, uses MD5, uses the same salt for all entries h(0,pwd). Another password has the same situation with the first one but uses a 8-bit salt h(s,pwd).

What command can I choose to make the brute force effective?
I choose 'hashcat64.exe --hash-type 10 --attack-mode 3 file1.txt', is there any command that can make it faster?

Thanks.